/* ========================================
   文件上传与文本存储系统 - 简约现代风格
   作者：Hackerdallas
   ======================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 基础色板 */
    --bg-page: #F8F9FA;
    --bg-card: #FFFFFF;
    --text-primary: #1A1A2E;
    --text-secondary: #6B7280;
    --text-muted: #9CA3AF;
    --border-color: #E5E7EB;
    --border-hover: #D1D5DB;

    /* 功能区配色 */
    --accent-upload-bg: #E8F4FD;
    --accent-upload-border: #BFDBFE;
    --accent-upload-text: #2563EB;
    --accent-text-bg: #E8F5E9;
    --accent-text-border: #BBF7D0;
    --accent-text-text: #16A34A;
    --accent-overview-border: #FDE68A;
    --accent-log-bg: #FFF3E0;
    --accent-log-border: #FED7AA;
    --accent-log-text: #EA580C;

    /* 侧边栏 */
    --sidebar-bg: #FFFFFF;
    --sidebar-accent: #3B82F6;
    --sidebar-hover: #EFF6FF;

    /* 按钮 */
    --btn-primary-bg: #3B82F6;
    --btn-primary-hover: #2563EB;
    --btn-secondary-bg: #F3F4F6;
    --btn-secondary-hover: #E5E7EB;
    --btn-danger-bg: #EF4444;
    --btn-danger-hover: #DC2626;
    --btn-success-bg: #16A34A;
    --btn-success-hover: #15803D;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.08);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* 过渡 */
    --transition: all 0.2s ease;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-page);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

/* 手势 */
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; border: none; outline: none; }

/* 选中 */
::selection { background: var(--accent-upload-text); color: white; }

/* 滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* 侧边栏 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 200px;
    height: 100vh;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.sidebar-version {
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    background: transparent;
    width: 100%;
    text-align: left;
}

.sidebar-btn:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-accent);
}

.sidebar-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

.sidebar-stat {
    font-size: 12px;
    color: var(--text-muted);
}

.sidebar-stat strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 移动端侧边栏抽屉 */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
}

.sidebar-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 101;
    width: 44px;
    height: 44px;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

@media (max-width: 1023px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.sidebar-open {
        transform: translateX(0);
    }

    .sidebar-overlay.sidebar-overlay-active {
        display: block;
    }

    .sidebar-toggle {
        display: flex;
    }

    .main-content {
        margin-left: 0 !important;
        padding-top: 76px;
    }
}

/* 主内容区 */
.main-content {
    margin-left: 200px;
    min-height: 100vh;
    padding: 32px;
}

/* 统计条 */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-card:nth-child(1) .stat-value { color: var(--accent-upload-text); }
.stat-card:nth-child(2) .stat-value { color: var(--accent-text-text); }
.stat-card:nth-child(3) .stat-value { color: var(--accent-log-text); }

@media (max-width: 640px) {
    .stats-bar {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .stat-card { padding: 14px; }
    .stat-value { font-size: 20px; }
    .stat-label { font-size: 11px; }
}

/* 栅格布局 */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.section-full {
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .grid-layout {
        grid-template-columns: 1fr;
    }
}

/* 卡片 */
.grid-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.grid-card:hover {
    box-shadow: var(--shadow-md);
}

.grid-card h2 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.grid-card h2 svg {
    width: 20px;
    height: 20px;
}

/* 色块卡片 */
.card-upload {
    background: var(--accent-upload-bg);
    border-color: var(--accent-upload-border);
}

.card-upload h2 { color: var(--accent-upload-text); }

.card-text {
    background: var(--accent-text-bg);
    border-color: var(--accent-text-border);
}

.card-text h2 { color: var(--accent-text-text); }

/* 表单 */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

input[type="file"],
input[type="text"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    background: var(--bg-card);
    color: var(--text-primary);
    transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--sidebar-accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
    min-height: 140px;
    resize: vertical;
    line-height: 1.6;
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

input[type="file"]::file-selector-button {
    background: var(--btn-primary-bg);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    margin-right: 12px;
    transition: var(--transition);
}

input[type="file"]::file-selector-button:hover {
    background: var(--btn-primary-hover);
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--btn-primary-bg);
    color: white;
}

.btn-primary:hover {
    background: var(--btn-primary-hover);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--btn-secondary-hover);
}

.btn-success {
    background: var(--btn-success-bg);
    color: white;
}

.btn-success:hover {
    background: var(--btn-success-hover);
}

.btn-danger {
    background: var(--btn-danger-bg);
    color: white;
}

.btn-danger:hover {
    background: var(--btn-danger-hover);
}

/* 小按钮 */
.btn-small {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.btn-small svg {
    width: 14px;
    height: 14px;
}

/* 按钮组 */
.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* 列表 */
.list {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    transition: var(--transition);
}

.item:last-child {
    border-bottom: none;
}

.item:hover {
    background: var(--bg-page);
}

.item-info {
    flex: 1;
    min-width: 0;
}

.item-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.item-name svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--text-muted);
}

.item-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.text-preview {
    background: var(--bg-page);
    padding: 12px;
    border-radius: var(--radius-sm);
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.item-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.item-actions .btn-small {
    background: var(--btn-secondary-bg);
    color: var(--text-secondary);
}

.item-actions .btn-small:hover {
    background: var(--sidebar-accent);
    color: white;
}

.item-actions .btn-delete:hover {
    background: var(--btn-danger-bg);
}

.item-actions .btn-view:hover {
    background: #8B5CF6;
}

.item-actions .btn-copy:hover {
    background: var(--btn-success-bg);
}

.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 48px 24px;
    font-size: 14px;
}

/* 日志 */
.log-container {
    background: var(--accent-log-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--accent-log-border);
    overflow-x: auto;
}

.log-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.log-table thead {
    background: var(--accent-log-text);
}

.log-table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: white;
    white-space: nowrap;
    font-size: 12px;
}

.log-table tbody tr {
    border-bottom: 1px solid var(--accent-log-border);
}

.log-table tbody tr:last-child {
    border-bottom: none;
}

.log-table tbody tr:hover {
    background: rgba(255,255,255,0.5);
}

.log-table td {
    padding: 12px 16px;
    color: var(--text-primary);
}

.log-filename {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
}

/* 消息提示 */
.message {
    background: linear-gradient(135deg, #DCFCE7 0%, #F0FDF4 100%);
    color: var(--btn-success-bg);
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    border: 1px solid #BBF7D0;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
}

.message svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

.toast.toast-show {
    transform: translateX(0);
}

.toast-success { border-left: 4px solid var(--btn-success-bg); }
.toast-error { border-left: 4px solid var(--btn-danger-bg); }
.toast-info { border-left: 4px solid var(--sidebar-accent); }

/* 确认弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.modal-overlay.modal-show {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    width: 90%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.2s ease;
}

.modal-overlay.modal-show .modal {
    transform: scale(1);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.modal-footer {
    padding: 16px 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--border-color);
}

/* 代码预览弹窗 */
.code-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
    z-index: 1001;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.code-modal-overlay.modal-show {
    opacity: 1;
    pointer-events: auto;
}

.code-modal {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform 0.2s ease;
}

.code-modal-overlay.modal-show .code-modal {
    transform: scale(1);
}

.code-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.code-modal-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.code-modal-actions {
    display: flex;
    gap: 8px;
}

.code-modal-btn {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    background: var(--btn-secondary-bg);
    color: var(--text-secondary);
    transition: var(--transition);
}

.code-modal-btn:hover {
    background: var(--btn-secondary-hover);
}

.code-modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.code-modal-body pre {
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
}

/* 上传相关 */
.selected-files-container {
    margin-top: 18px;
    background: var(--bg-page);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}
.selected-files-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.selected-files-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}
.selected-file-list {
    max-height: 200px;
    overflow-y: auto;
    padding: 12px;
}
.selected-files-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border-color);
}
.selected-total-size {
    font-size: 12px;
    color: var(--text-muted);
}
.btn-clear-selected {
    background: transparent;
    color: var(--text-muted);
    padding: 4px 8px;
    font-size: 12px;
}
.btn-clear-selected:hover {
    color: var(--btn-danger-bg);
}

#progressContainer {
    margin-top: 18px;
    background: var(--bg-page);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    padding: 16px;
    display: none;
}
.progress-track {
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}
#progressBar {
    height: 100%;
    background: var(--btn-primary-bg);
    width: 0%;
    border-radius: 4px;
    transition: width 0.3s ease;
}
.progress-stats {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
}
#progressText {
    font-weight: 600;
    color: var(--btn-primary-bg);
}